For our online shop, we are giving out coupon codes (also called "promo code" or "voucher code").
Currently, these codes look like an insane developer has designed the format:
In fact that insane developer was me. I've used a GUID.
Now I'm seeking for a (at least slightly) more usable format.
I can imagine of something like YouTube video URLs:
Or just the current timestamp in ticks:
Or the current UNIX epoch time:
Or maybe some prefix to identify our product? Like e.g.:
How would you "design" the format/syntax of a coupon code?
I forgot to mention: We are giving out multiple different coupons. So something like "BUYIT" or other meaningful strings would not fit. I guess we need some random part.